Question

Movement and accumulation of ions across a membrane against their concentration gradient can be explained by ______.

Options

• Facilitated Diffusion

• Passive Transport

• Active Transport

• Osmosis

Answer 1

Movement and accumulation of ions across a membrane against their concentration gradient can be explained by Active transport.

Explanation:

Active transport is a biological process in which ions or molecules move across a cell membrane from a region of lower concentration to a region of higher concentration, i.e., against the concentration gradient. Cellular energy is required for this movement. There are two types of active transport: primary and secondary. Primary active transport uses energy in the form of ATP, while secondary active transport uses an electrochemical gradient.